Huawei UPS5000-E-30 kVA - Page 162

Table 7-1 Troubleshooting
Case Symptom Possible Cause Measure
Rectier
abnormal
The UPS rectier
cannot work, and the
bus voltage is not
boosted.
The mains voltage
exceeds the upper
threshold 280 V or
is less than the
lower threshold 80
V.
Check whether the
mains voltage is
beyond the allowed
range. If so, contact
the electric power
company.
PFC soft-start fails. Replace the power
module.
The power
module is faulty.
Replace the power
module.
Inverter
abnormal
The buzzer buzzes, the
fault indicator is on,
the inverter is faulty,
and the UPS transfers
to bypass mode.
Output overload
or short-circuit
exists.
Reduce the load or
troubleshoot the
short circuit.
The inverter is
overheated.
Install more smart
cooling products or
ventilation devices to
ensure normal
temperature inside
the data center.
The power
module is faulty.
Replace the power
module.
Charger
alarm
The buzzer buzzes, the
fault indicator is on,
and the charging
function fails.
The charger fails. Replace the power
module.
The charger
experiences
overcurrent.
Replace the power
module.
The charger
experiences
undervoltage.
Check whether the
number of batteries
is correct. If the
number of batteries
is correct but the
alarm persists,
replace the power
module.
The UPS
works in
bypass
mode and
does not
transfer to
inverter
mode.
When the mains is
normal, the UPS
works in bypass mode
and does not transfer
to inverter mode.
The UPS is set to
ECO mode.
Set the working
mode correctly.
The number of
bypass transfer
times reaches the
upper limit.
Reset the bypass
transfer times on the
LCD.
UPS5000-E-(30 kVA–180 kVA)
User Manual (Integrated UPS) 7 Troubleshooting
Issue 02 (2022-12-30) Copyright © Huawei Digital Power Technologies Co., Ltd. 154